Compressible brazed connector



Feb- 19, 195 I. F. MATTHYSSE COMPRESSIBLE BRAZED CONNECTOR Filed June 12, 1944 m I I I n m 4 w INVENTOR lruirgi'reaerz'cliiflaiz'lysse BY \Ju'w/ A KEY Patented Feb. 19, 1952 2,586,471 GOMPRESSIBLE BRAZED. ooNNEc-ToR Irving Frederick Matthysse, New York, N. Y., as-

signor to Burndy Engineering Company, Inc.,

a corporation of New Yc'rk Application June 12, 1944, Serial No. 539,803

My invention relates to tubular electrical connectors that are compressed or indented to a conductor to establish electrical and mechanical connection therewith.

Hitherto connectors of this type have employed seamless tubing or sheet metal strips provided. with interlocked ends. Such connectors are made of copper that is malleable and convenient for indenting. The conductor being drawn, is harder than the connector body and it is therefore difli cult to force the softer material of the body wall into the conductor by an indenting tool.

The principal object of my invention is to provide a tubular connector body, provided with material harder than the conductor and which will securely grip the same when the connector is compressed.

I accomplish the foregoing by using a sheet metal connector body, the two longitudinal edges of which are joined together by brazing material, which material is harder than the conductor. When the connector is compressed, preferably along the seam, the harder brazing material is driven into the conductor, keying the conductor to the connector, resulting in greater pull out values than have hitherto been obtained, and in fact approximating the ultimate strength of the conductor.

I accomplish these and other objects and obtain my new results as will be apparent from the device described in the following specification, particularly pointed out in the claims, and illustrated in the accompanying drawing in which:

Fig. 1 is a side elevation of a tubular connector having a terminal lug.

Fig. 2 is a transverse section along 2-2 of Fig. 1, illustrating the brazed seam.

Fig. 3 is a similar section after indentation.

Fig. 4 is a transverse section illustrating the brazed seam, and a longitudinal slot, at the opposite side, filled with brazing material.

Fig. 5 is a top view of the connector after indentation.

Fig. 6 is a longitudinal cross-section of the same.

Referring more in detail to the drawing, reference numeral I designates a connector body, one end of which has been flattened to form a terminal lug II. The connector body is preferably made of sheet metal rolled into tubular form so that the two longitudinal edges l2 and 13 are adjacent to each other. The two edges are brazed together with brazing material 14 having a hardness greater than the sheet metal or the conductor l5.

Claims. (Cl. 173 269) .7 in Fig. 3.

In making the connection, the connector wall is compressed, using suitable tools, as for instance dies 16 and I1, causing the brazed material to be driven into the conductor, as shown The brazed material is placed into the seam in a manner which leaves an irregular surface longitudinally which facilitates the gripping action.

In Fig.4, the brazed seam is supplemented by depositing some of the brazing material l8 in a longitudinal groove l9. When the two sides of the connector body are compressed, the two opposite lines of brazed material are driven into the conductor. increasing the pull out values.

'In compressing the connector body, scfiicient tension is developed in the body walls, to cause them to thin out slightly. The brazed material being less ductile, remains, and a greater proportion of it is keyed into the conductor.

By selecting the harder type of brazing alloys, the foregoing results are obtained. There is no evidence of cracking, even when the indenting tool is forced directly into the brazed seam. The material of the braze, running the full extent of the seam, inherently seals off any capillary passages opening into said seam.

By using brazed seams I not only obtain the keying action of the harder metal, but sheet metal can be used to form the connector body. The seams and grooves may be placed circumferentially as well as longitudinally.

I have thus described my invention, but I desire it understood that it is not confined to the particular forms or uses shown and described, the same being merely illustrative, and that the invention may be carried out in other ways without departing from the spirit of my invention, and, therefore, I claim broadly the right to employ all equivalent iristrumentalities coming within the scope of the appended claims, and by means of which, objects of my invention are attained and new results accomplished, as it is obvious that the particular embodiments herein shown and described are only some of the many that can be employed to attain these objects and accomplish these results.

I claim:

1. An electrical connector comprising a tongue, and a ferrule portion integral therewith for receiving the end of an electrical conductor; said ferrule portion being of cylindrical config uration and having a seam running the length thereof, said seam being reinforced against opening and sealed against moisture by a braze, and the material of said braze running the full extent of said seam and sealing off any capillary passages opening into said seam.

2. An electrical connection comprising a connector having a tongue and a ferrule portion integral therewith having therein the end of an electrical conductor made of stranded wires, said ferrule portion being of cylindrical configuration and having a seam running the length thereof, said seam being reinforced against opening and sealed against moisture by a braze, the material of said braze running the full extent of said scam in contact with the electrical conductor, said brazed seam being crimped onto the conductor, sealing off any openings to said sea-m.

3. An electrical connection comprising a connector having a tongue and a ferrule portion integral therewith having therein the end of an electrical conductor made of stranded wires, said ferrule portion being of cylindrical configuration and having a seam running the length thereof, said seam being reinforced against opening and sealed against moisture by a braze, the material of said braze running the full, extent of said scam in contact with the electrical conductor, a portion of which material is crimped into the electrical conductor causing the material of the braze to be keyed to the conductor strengthening the connection.

4. A connector having a tubular body for receiving a conductor therein, said body having securely added thereto a brazing material extending entirely through the wall of the tubular body and positioned on the tubular body so as not to project substantially beyond the outer or inner surface of the body, said brazing material being harder than said tubular body.

5. A crimp type electrical connector which comprises malleable sheet metal having one portion thereof formed into a contact portion adapted to make electrical contact with an electrical conductor, a neck portion integral with said con tact portion and having free lateral edges at opposite sides thereof, a ferrule portion wherein the sheet metal is curled with its lateral edges abutting so as to form a hollow ferrule for reception of a malleable conductor with which it is to be crimped together, and a brazing metal fused to said lateral edges of the ferrule portion in an area adapted for such crimping with an inserted conductor, said brazing metal extending through the seam substantially to the inner face of said ferrule.

IRVING FREDERICK MATTHYSSE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,936,185 Brenizer Nov. 21, 1933 2,142,818 Jacobson Jan. 3, 1939 2,149,209 Dickie et a1. Feb. 28, 1939 2,275,163 Thomas, Jr. Mar. 3, 1942 OTHER REFERENCES Publication Bulletin #12--Silfoss-Easyflo by Handy and Harman, October 1'7, 1941. (Original in Div. 14.) 

